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Table of Contents
Short answer: shower, get lube, allow time. A lot of what circulates as compulsory rests on weaker evidence than it sounds.
Most of the nerves before a first time are about cleanliness. The anatomical finding on that takes a lot of the pressure off.
The sequence, step by step
Six steps cover it: eat as usual, toilet, shower, lay everything out, agree the terms, take your time. Part of that is evidenced, and the rest is practical convention.
On the day: Eat normally. Not one peer-reviewed study exists on diet before anal sex, neither on fibre nor on lists of things to avoid. Transit to the rectosigmoid takes around 11 hours on average, and the differences between individuals are wide. No sensible waiting period can be derived from that.
One to two hours before: Go to the toilet when the urge comes. Then shower. That settles the hygiene part for almost every situation.
Half an hour before: Lay out lube, condoms and a towel, put the sheet on the bed. Hunting for any of it later interrupts at exactly the wrong moment.
Just before: Agree who wants what and when you stop. A safeword costs nothing.
Going in: Take your time. The internal sphincter opens through a reflex, and that takes minutes rather than seconds.
Afterwards: Drink something, rinse off, check that everything is intact.
What is actually inside your rectum
One finding settles most of the question. The rectum is the last section of the large bowel, and outside of a bowel movement it is physiologically empty or close to it. Stool sits higher up in the descending colon and only travels down through a mass movement. Several independent reference sources describe it the same way, among them the Merck Manual and a 2024 review article.
In practice that means a normal trip to the toilet plus a shower usually leaves you ready. A flannel, soap and warm water on the outside will do. On the road, wet wipes cover it.
If something does happen, it is not a catastrophe. The anal canal is an entrance and an exit at once. What can go wrong is covered in the post on anal sex accidents.
One rule stands anyway. What has been up there does not go straight into a mouth. For fingers and toys that means washing them, for a cock it means a fresh condom. Condoms are single-use and never get reused.
Douching, or leaving it alone
Between 52 % and 65 % of men who have sex with men have rinsed rectally at least once. That range pools several surveys, among them an online survey of 1,725 participants across 112 countries and a 2018 literature review. Among men who mostly bottom it runs as high as 88 %.
That online survey found a raised odds ratio for infection with HIV (human immunodeficiency virus) among those who douched. It came to 1.68, with a confidence interval of 1.26 to 2.24. For other sexually transmitted infections the figure was 1.74, there the interval ran from 1.01 to 3.00. A study from Shenyang with 515 participants reached 2.8 with an interval of 1.4 to 5.4. For men using a shower hose the figure was 3.3 and the interval 1.0 to 11.3.
Both intervals around 1.74 and 3.3 touch 1, which makes those two findings weak. Both studies are cross-sectional as well, so they show an association rather than a cause. The authors name the obvious alternative themselves. Men who douche tend to bottom more often, have more partners and use condoms less. Douching would then run alongside the risk.
As a damage mechanism, researchers propose irritation of the lining by water, soap or laxatives, plus injuries from shower attachments with irregular edges. Nobody has measured it. How often things actually get messy without douching has never been counted either.
If you want to rinse anyway, there are gentler routes than a shower hose. The options and their limits sit in the posts on bowel cleansing before sex and on spontaneous cleaning hacks.
Lube, and why the amount matters
Your rectum depends on lubricant, otherwise you get friction. Four types are available: water-based, silicone-based, hybrid and oil-based. Water-based is the default and works with condoms and with every toy, though you have to keep topping it up.
Which type suits which job, which ingredients matter and what to watch with silicone toys is covered in the guide to anal lube. For preparation, what counts is the amount plus one point about materials.
Oil and condoms rule each other out
This point is hard evidence and still gets told wrong constantly. A 1989 lab study exposed latex condoms to mineral oil for 60 seconds. Burst volume then collapsed by roughly 90 %, from 28.9 to 4.2 litres. A body lotion containing mineral oil worked more slowly, though it was measurable from about five minutes. Water-based products and glycerin showed no effect.
Polyisoprene is judged just as oil-sensitive by the WHO (World Health Organization) and other testing bodies. Polyurethane resists oil better, yet even there not every lubricant is safe. In 2018 the American drug regulator required a polyurethane condom to change its warning label after material testing.
Coconut oil, massage oil, cooking oil and pure petroleum jelly have never been tested for condom compatibility in their own right. They sit on warning lists as a precaution. Hybrid products are tested against latex and polyisoprene under a standardised method, and no such evidence exists for polyurethane. Those material tests come from the manufacturers, and independent comparisons are missing.
So: once a condom is involved, oil has no business being there. Without a condom, oil is an option, but then without latex gloves and without toys whose material you do not know.
Relaxing and getting used to it
Your anus is closed by 2 muscles, and only one of them takes orders. The internal sphincter opens through a reflex, and that reflex answers to pressure and time. Willpower never reaches it.
Regular practice shifts the limit. A finger first, later a small plug in the size you start at. A sensible progression is laid out in the post on anal stretching. Suitable models sit in the guide to anal toys for beginners, and the measurements in the plug size guide.
That leaves the most common worry, namely whether anal sex weakens the sphincter permanently. A small study of 14 men found no defects. A French questionnaire study of 21,762 participants found 12.7 % faecal incontinence among men who bottom, against 5.7 % among those who do not. On the sphincter question, a 2024 review still calls the picture contradictory. A flat no is unavailable, and so is an evidenced warning.
What to have with you
Five things cover nearly every situation: lube, condoms, wet wipes, a towel and something to put underneath. An old sheet or a washable blanket saves you changing the bedding.
For the road it gets smaller. One tube of lube, two condoms and wet wipes fit in any jacket pocket. Soap and a damp flannel in a bag are the addition for anyone who likes to be thorough.
Condoms, PrEP and doxy-PEP
A randomised study covering 4,884 sex acts found clinical condom failure in 0.7 % of anal acts against 1.9 % of vaginal ones. The gap shrank almost to nothing once the researchers accounted for lubricant. 98.3 % of the anal acts ran with condom-compatible lube, against 41.6 % of the vaginal ones.
Those authors therefore credit the lube rather than the anatomy, and that reading is their own. In the subgroup using unsuitable lubricant, condoms failed in 2 of 16 acts, so 12.5 % against 1.3 % overall. Sixteen acts is a small subgroup, though the finding lines up with the material study above. In practice: use more lube and top it up.
PrEP (pre-exposure prophylaxis) lowers the risk of HIV infection. The iPrEx study with 2,499 participants reported 44 % risk reduction overall, with a confidence interval of 15 to 63 %. At adherence of at least 90 % the figure was 73 %, with an interval of 41 to 88 %. A British study with 544 participants reported 86 %. What else protects you is covered under HIV prevention.
Doxy-PEP (doxycycline as post-exposure prophylaxis) is newer. Since 2024 the American health authority has recommended a single 200 mg dose of doxycycline within 72 hours of sex. It applies to men who have sex with men and to trans women with at least one bacterial infection in the past year. The underlying trial of 637 participants produced a relative risk of 0.39.
That authority lists four caveats itself. The effect against gonorrhoea is weaker and inconsistent, and resistance development is unresolved. Long-term microbiome effects are unstudied, and outside those two groups there is no efficacy data at all. This belongs in a clinic.
Poppers, and what they really do
Alkyl nitrites relax smooth muscle via nitric oxide. That mechanism is established. Whether any of it reaches the internal sphincter has never been measured. The responsible British advisory council stated in 2024 that no clinical trial exists on the question. No dose-response relationship is known either.
Two risks are clear instead. Combined with erection pills from the phosphodiesterase-5 inhibitor group, nitrites can drop blood pressure dangerously. The mechanism is established, though the measurements behind it come from studies using pharmaceutical nitrates. On top of that come retinal changes, documented across four case series and one case report with a matching pattern. How often that happens is unknown, because there is no denominator.
One British analysis counted 42 deaths linked to poppers between 1987 and 2018 in total. That case series shows no connection to erection pills.
A popular counter-argument fails on inspection. The idea that poppers raise injury risk because you notice pain less has no evidence behind it. A 2024 survey of 1,119 men found no link between poppers and pain during receptive anal sex. For alcohol, cannabis, nicotine and methamphetamine it found one. More on dosing sits under how often to use poppers.
When it hurts
Pain during receptive anal sex is common, and the figures vary enormously. A study of 404 men found frequent severe pain in 14 %. A survey of 1,190 men who had bottomed in the preceding four weeks found some degree of pain in 59 %. A Polish survey with 1,443 participants reached 77.7 %. Across all studies the range runs from 14 % to 88.9 %, because no shared definition exists.
On causes the studies disagree. The four-week survey points at too little lube and missing foreplay. The Polish survey weighed every variable against the others and kept three. Age, performance anxiety with an odds ratio of 1.94, and internalised homophobia at 1.04. That second figure sits almost on the null value, so performance anxiety is what actually carries. Amount of lube, frequency and partner numbers dropped out of the model.
Two explanations therefore stand against each other, and that is the honest state of it. For the amount of lube it means this: the material data and the condom study support it, while the pain study failed to confirm it. Plenty of lube stays sensible, and as evidenced pain prevention it does not qualify.
Sex positions have never been studied. Which position hurts less or protects better has gone unmeasured. The advice on pelvic floor relaxation comes from general pain research and was never tested on anal sex.
Whether pain reliably signals tissue damage is unproven too. The strongest predictors are psychological. Practically it still holds: stop at pain, add lube, slow down, and if it stays, call it a night.
See a doctor for persistent bleeding, pain on the toilet lasting several days, fever, new incontinence and anything stuck. Pain on the toilet together with blood points to an anal fissure, meaning a tear in the skin of the anal canal.
Place, bed and surroundings
Your setting needs 2 things: something underneath and light you feel good in. Anal sex is wet, slippery and occasionally messy. A sheet underneath handles that without anyone having to discuss it.
Atmosphere is the rest of it, and it costs ten minutes. Laundry away, lights down, towel within reach, phone on silent. During rough sex the surroundings rarely register. If you are nervous, a room you feel comfortable in does more than any technique.
FAQ
Do I have to douche before anal sex?
No. The rectum is physiologically empty outside of a bowel movement, so a shower covers it. Men who douche regularly turn up more often with HIV and other infections in surveys, although those cross-sectional studies only show an association.
How long before should I stop eating?
No study addresses waiting periods before sex. Transit to the rectosigmoid takes around 11 hours on average, and the differences between individuals are wide. No reliable timing can be derived from it.
Can I use coconut oil as lube?
With a latex condom, no. Mineral oil cut the burst volume of latex by roughly 90 % within 60 seconds in the lab. Coconut oil itself was never tested, it sits on warning lists as a precaution. Without a condom it is an option, but then without latex gloves.
Do numbing lubes help with pain?
We advise against them. Lidocaine is absorbed through the rectal lining, and the American drug regulator has warned since 2006 that benzocaine can disrupt oxygen transport in the blood. Pain is also the only feedback you get.
Does anal sex loosen the sphincter?
The evidence conflicts. Fourteen men examined showed no defects, while a questionnaire study of 21,762 participants found 12.7 % faecal incontinence against 5.7 % in the comparison group. A 2024 review calls the question open.
How much lube is enough?
More than you think, and top it up rather than ration it. In the randomised condom study, 98.3 % of anal acts ran with condom-compatible lube. The authors credit exactly that for the low failure rate of 0.7 %.